WO2018098989A1

WO2018098989A1 - Heat exchanging fin, multi-bend heat exchanger, and air conditioner

Info

Publication number: WO2018098989A1
Application number: PCT/CN2017/082453
Authority: WO
Inventors: 赵夫峰; 林竹; 刘亚军; 周雷; 刘乾坤; 陈华伟; 张�浩
Original assignee: 美的集团武汉制冷设备有限公司; 美的集团股份有限公司
Priority date: 2016-11-29
Filing date: 2017-04-28
Publication date: 2018-06-07
Also published as: CN106595020A; CN116026180A; CN106595020B

Abstract

A heat exchanging fin (100) comprises a plurality of subfins (110) arranged in a row and a strip-shaped connection member (120) disposed between two adjacent subfins (110). Two ends of the strip-shaped connection member (120) are respectively connected to the two adjacent subfins (110). Also disclosed are a multi-bend heat exchanger, and an air conditioner.

Description

Heat exchange fins, multi-fold heat exchangers and air conditioners

Technical field

The invention relates to the technical field of air conditioners, in particular to a heat exchange fin, a multi-fold heat exchanger and an air conditioner.

Background technique

The poly-type heat exchanger used in the existing air conditioner is generally composed of a plurality of independent sub-heat exchangers. After each sub-heat exchanger is separately formed, the end plates of the plurality of sub-heat exchangers are connected to the connecting plate by screws. Together, form a multi-fold heat exchanger. For the multi-fold heat exchanger of this structure, each sub-heat exchanger needs to be separately formed, and then the end plate is connected with the connecting plate, and there are many processes, resulting in low production efficiency of the multi-fold heat exchanger.

Summary of the invention

SUMMARY OF THE INVENTION A primary object of the present invention is to provide a heat exchange fin for the purpose of improving the assembly efficiency of a multi-fold heat exchanger.

In order to achieve the above object, the heat exchange fin of the present invention comprises a plurality of unit fins arranged in a row and a strip connecting piece disposed between two adjacent unit fins, the strip shape Both ends of the connecting piece are respectively connected to two adjacent unit fins.

Preferably, the heat exchange fin further includes an auxiliary connecting piece disposed between two adjacent unit fins, and two ends of the auxiliary connecting piece and two adjacent unit fins respectively Connected, the auxiliary connecting piece has a gap with the strip connecting piece at a corresponding position.

Preferably, the plurality of unit fins have the same width.

Preferably, the unit fins are provided with a plurality of first mounting holes for mounting the heat exchange tubes, and the plurality of the first mounting holes are arranged in a plurality of rows arranged in parallel, each row including a plurality of units along the unit The first mounting holes are disposed at a uniform interval in the longitudinal direction of the fins, and in the same one of the unit fins, the first mounting holes of two adjacent rows are staggered, and the first two of the two rows are adjacent to each other. The mounting holes are spaced apart by a first distance, and any one of the first mounting holes is spaced apart from the other two of the adjacent ones of the adjacent rows by a second distance.

Preferably, the first mounting holes of at least two of the unit fins have the same aperture; the first mounting holes have the first distances of the two unit fins having the same aperture, the first distance The second distances of the two unit fins having the same aperture of a mounting hole are equal.

Preferably, the first mounting holes of the at least two adjacently disposed unit fins have the same aperture; the first mounting hole of one of the unit fins closest to the abutment, and the other one The first mounting holes closest to the abutment in the unit fins are spaced apart by a first distance or a second distance.

Preferably, at least one of the unit fins is further provided with a plurality of second mounting holes for mounting the heat exchange tubes, the first mounting holes and the second mounting holes have the same aperture, and the same one of the unit wings In the sheet, the second mounting hole is spaced apart from the first one of the first mounting holes by the first distance or the second distance corresponding to the unit fin; the second mounting hole is adjacent to the nearest one. Another of the second mounting holes is spaced apart from the first distance or the second distance corresponding to the unit fins.

Preferably, the first mounting holes of the at least two adjacently disposed unit fins have the same aperture; the second mounting hole of the unit fin group closest to the abutment, and the other The first mounting holes closest to the adjacent ones of the unit fins are spaced apart by a first distance or a second distance; or, the second mounting holes of the one of the unit fin sets closest to the abutting, and the other The second mounting holes of the unit fins closest to the abutment are spaced apart by a first distance or a second distance.

Preferably, the first mounting holes of at least two of the unit fins have different apertures.

Preferably, in at least two of said unit fins,

The first mounting hole of one of the unit fins has an aperture of 3-6 mm, and a ratio of the first distance corresponding to the unit fin to the second distance corresponding to the unit fin is 1.2 -1.7;

The first mounting hole of the other unit fin has an aperture of 6-8 mm, and a ratio of the first distance corresponding to the unit fin to the second distance corresponding to the unit fin is 1-1.5.

The invention also provides a multi-fold heat exchanger comprising: a side plate, a plurality of heat exchange fins arranged in a stack, and a plurality of heat exchange tubes, the plurality of stacked heat discharge tubes a heat exchange fin is disposed on one side of the side plate, and the heat exchange fin includes a plurality of unit fins arranged in a row and a strip connecting piece disposed between two adjacent unit fins The two ends of the strip connecting piece are respectively connected with two adjacent unit fins, and the plurality of unit fins of the corresponding position of the heat exchange fin constitute a unit fin group; the heat exchange The tube is mounted on the side panel and is disposed through the corresponding unit fin group.

Preferably, the plurality of unit fins have the same width.

Preferably, in at least two of said unit fins,

The invention also provides an air conditioner, comprising a multi-fold heat exchanger, the multi-fold heat exchanger comprising: a side plate, a plurality of heat exchange fins arranged in a stack, and a plurality of heat exchange tubes, a plurality of stacked heat exchange fins disposed on one side of the side plate, the heat exchange fins including a plurality of unit fins arranged in a row and two adjacent unit fins disposed adjacent to each other a strip-shaped connecting piece, the two ends of the strip-shaped connecting piece are respectively connected with two adjacent unit fins, and the plurality of unit fins of the corresponding position of the heat-exchange fin form a unit-wing a heat exchange tube is mounted on the side plate and is disposed through the corresponding unit fin group.

In the technical solution of the present invention, the heat exchange fins comprise a plurality of unit fins arranged in a row, and when the heat exchange fins are applied in the multi-fold heat exchanger, the plurality of heat exchange fins are arranged by stacking So that the unit fins of the corresponding positions of the plurality of heat exchange fins form a unit fin group, and each unit fin group and the inserted heat exchange tube and the corresponding plate body together form an independent heat exchange portion, The multi-fold heat exchanger can be divided into a plurality of heat exchange parts, and the adjacent two heat exchange parts are arranged in a V shape or a shape, so that the multi-fold heat exchanger is bent and set; wherein, the plurality of unit fins pass The strip connecting pieces are sequentially connected into one whole, so that all the unit fins of the entire heat exchange fin can be cut and formed at one time, and the fins of each heat exchange portion are separately formed with respect to the existing multi-fold heat exchanger. The production efficiency of the heat exchange fins can be improved. At the same time, the unit fins are connected by the strip connecting pieces, and when the multi-fold heat exchanger is assembled, the strip connecting pieces can be bent as needed, so that the unit fins are not changed. The shape of the multi-fold heat exchanger bend setting, due to The strip connecting piece has already connected the adjacent two unit fins, thereby simplifying the alignment operation when the heat exchange portion is mounted, thereby further improving the assembly efficiency of the corresponding multi-fold heat exchanger.

DRAWINGS

1 is a schematic structural view of an embodiment of a heat exchange fin of the present invention;

2 is a schematic structural view of another embodiment of a heat exchange fin of the present invention;

3 is a schematic structural view showing a state in which the heat exchange fins shown in FIG. 2 are bent;

4 is a schematic structural view showing a bending state of still another embodiment of the heat exchange fin of the present invention;

Fig. 5 is a schematic view showing the structure of an embodiment of a multi-fold heat exchanger according to the present invention.

Description of the reference numerals:

标号Label	名称name	标号Label	名称name
100100	换热翅片Heat exchange fin	200200	边板Edge board
300300	换热管Heat exchange tube	110或110’110 or 110’	单元翅片Unit fin
120120	条形连接片Strip connecting piece	130130	辅助连接片Auxiliary connecting piece
111或111’111 or 111’	第一安装孔First mounting hole	112或112’112 or 112’	第二安装孔Second mounting hole

The implementation, functional features, and advantages of the present invention will be further described in conjunction with the embodiments.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

It should be noted that if there is a directional indication (such as up, down, left, right, front, back, ...) in the embodiment of the present invention, the directional indication is only used to explain in a certain posture (as shown in the drawing) The relative positional relationship between the components, the motion situation, and the like, if the specific posture changes, the directional indication also changes accordingly.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of the "first", "second", etc. is used for the purpose of description only, and is not to be construed as an Its relative importance or implicit indication of the number of technical features indicated. Thus, features defining "first" or "second" may include at least one of the features, either explicitly or implicitly. In addition, the technical solutions between the various embodiments may be combined with each other, but must be based on the realization of those skilled in the art, and when the combination of the technical solutions is contradictory or impossible to implement, it should be considered that the combination of the technical solutions does not exist. It is also within the scope of protection required by the present invention.

The invention proposes a heat exchange fin.

Referring to FIG. 1 or FIG. 2, in the embodiment of the present invention, the heat exchange fin 100 includes a plurality of unit fins 110 arranged in a row and disposed between two adjacent unit fins 110. The strip-shaped connecting piece 120 has two ends connected to the adjacent two of the unit fins 110, respectively.

In the technical solution of the present invention, the heat exchange fin 100 includes a plurality of unit fins 110 arranged in a row, and the heat exchange fins 100 are applied to the multi-fold heat exchanger by passing a plurality of heat exchange fins 100 The arrangement is such that the unit fins 110 of the corresponding positions of the plurality of heat exchange fins 100 constitute a unit fin 110 group, and each unit fin 110 group is shared with the heat exchange tube 300 and the corresponding plate body. The utility model comprises an independent heat exchange part, wherein the multi-fold heat exchanger can be divided into a plurality of heat exchange parts, and the adjacent two heat exchange parts are arranged in a V shape or a shape, thereby realizing the bending arrangement of the multi-fold heat exchanger Wherein, the plurality of unit fins 110 are sequentially connected as a whole through the strip connecting piece 120, so that all the unit fins 110 of the entire heat exchange fin 100 can be cut and formed at one time, compared to the existing multi-fold heat exchanger When the fins of each heat exchange portion are separately formed, the production efficiency of the heat exchange fins 100 can be improved, and at the same time, the unit fins 110 are connected by the strip-shaped connecting pieces 120, and the multi-fold heat exchangers are assembled, strip-shaped The connecting piece 120 can be bent as needed so as not to change the shape of the unit fin 110 At the same time, the multi-fold heat exchanger is bent, and since the strip-shaped connecting piece 120 has connected the adjacent two unit fins 110, the alignment operation during the heat-exchange part mounting can be simplified, thereby further improving The assembly efficiency of the corresponding multi-fold heat exchanger.

Referring to FIG. 1 or FIG. 2, when the heat exchange fins 100 are formed, an auxiliary connecting piece 130 having a certain gap (1-5 mm) with the strip connecting piece 120 may be added to one side of the strip connecting piece 120 to assist The connecting piece 130 is disposed between two adjacent unit fins 110. Two ends of the auxiliary connecting piece 130 are respectively connected to two adjacent unit fins 110, and the auxiliary connecting piece 130 and the corresponding position are respectively connected. There is a gap between the strip connecting pieces 120, and the auxiliary connecting piece 130 can increase the connection strength between the unit fins 110, increase the overall reliability of the heat exchange fins 100, and facilitate the transportation of the heat exchange fins 100. When the multi-fold heat exchanger is assembled, the auxiliary connecting piece 130 is cut off (dotted line in FIG. 1) before the bending operation, and the influence of the auxiliary connecting piece 130 on the assembly can be avoided, wherein the auxiliary connecting piece 130 is connected to the strip. The gap between the sheets 120 prevents the strip-shaped connecting piece 120 from being cut when the auxiliary connecting piece 130 is cut. In order to facilitate the cutting and forming of the heat exchange fins 100, a plurality of the unit fins 110 are disposed to have the same width, so that the long sides of the heat exchange fins 100 can be cut at one time during the cutting operation, and the cutting operation is simple, which is favorable for improving heat exchange. The production efficiency of the fins 100.

Referring to FIG. 1 , a heat exchange tube 300 of a multi-fold heat exchanger is disposed through a heat exchange fin 100 , wherein the unit fins 110 are provided with a plurality of first heat exchange tubes 300 for passing through to achieve installation. The mounting hole 111, the plurality of the first mounting holes 111 are arranged in a plurality of rows arranged in parallel, each row comprising a plurality of the first mounting holes 111 disposed at a uniform spacing along the length direction of the unit fins 110, the same In the unit fins 110, the first mounting holes 111 of the adjacent two rows are staggered, and the adjacent two first mounting holes 111 of any one of the rows are spaced apart by a first distance P, and any one of the first mounting holes 111 is spaced apart from the other two of the adjacent ones of the adjacent rows by the second distance N. The long U tube thus connected to the heat exchange tube 300 can have a uniform specification (corresponding to the first distance P), and the semicircular tube can have a uniform specification (corresponding to the second distance N), so that the specification of the connection tube can be unified, the alignment operation can be simplified, and the alignment is facilitated. Assembly efficiency of the heat exchange tube 300. In order to further improve the versatility of the long U tube and the semicircular tube, the first mounting holes 111 of the at least two of the unit fins 110 may be provided with the same aperture; the first mounting holes 111 have the same aperture. The first distances P of the unit fins 110 are equal, and the second distances N of the two unit fins 110 having the same aperture of the first mounting hole 111 are equal. It may be further provided that the first mounting holes 111 of the at least two adjacently disposed unit fins 110 have the same aperture; the first mounting hole 111 of the one of the unit fins 110 closest to the abutment, Separating a first distance P or a second distance N from the first mounting hole 111 closest to the other of the unit fins 110; at this time, two of the adjacent two heat exchange portions are closest to each other When the heat exchange tubes 300 in the first mounting holes 111 are connected, a long U tube or a semicircular tube of the same specification used for connecting the other heat exchange tubes 300 may be used for connection. In this way, it can be ensured that the heat exchange tubes 300 of the corresponding two heat exchange portions can be connected by using the long U tube of the same specification and the semicircular tube of the same specification, thereby further simplifying the alignment operation and improving the assembly efficiency.

Referring to FIG. 2 or FIG. 4 , in order to improve the utilization ratio of the unit fins 110 , the second mounting holes 112 may be opened at a position where the first mounting holes 111 are not provided at the corners of the unit fins 110 , and the second mounting holes 112 are also The heat exchange tube 300 can be installed, thereby increasing the number of heat exchange tubes 300 corresponding to the unit fins 110, and improving the heat exchange efficiency of the corresponding heat exchange portion; please refer to FIG. 2 and FIG. 3, or FIG. 4; in this embodiment, At least one of the unit fins 110 (or 110') is further provided with a plurality of second mounting holes 112 (or 112') for mounting the heat exchange tubes 300, the first mounting holes 111 (or 111') Equal to the aperture of the second mounting hole 112 (or 112'), in the same unit fin 110 (or 110'), the second mounting hole 112 (or 112') and the nearest one The first mounting hole 111 (or 111') is spaced apart from the first distance P (or P') or the second distance N (or N') corresponding to the unit fin 110 (or 110'); The second mounting hole 112 (or 112') is spaced apart from the other adjacent second mounting hole 112 (or 112') by the unit fin 1 10 (or 110') corresponds to the first distance P (or P') or the second distance N (or N'). The first mounting hole 112 is spaced apart from the nearest one of the first mounting holes 111 by a first distance P or the second distance N; the second mounting hole 112 is spaced apart from the nearest second mounting hole 112 by a first distance P or the second distance N, so that the heat exchange tube 300 corresponding to the second mounting hole 112 can be connected to the other heat exchange tubes 300, and a long U tube or a semi-circular tube of the same specification can be used to simplify the alignment operation and improve Assembly efficiency. At this time, referring to FIG. 3, when the apertures of the first mounting holes 111 of the at least two adjacently disposed unit fins 110 are the same, one of the unit fins 110 is closest to the adjacent portion. The second mounting hole 112 is spaced apart from the first mounting hole 111 closest to the other of the unit fins 110 by a first distance P or a second distance N; or one of the unit fins 110 The second mounting hole 112 closest to the abutment is spaced apart from the second mounting hole 112 closest to the other of the unit fins 110 by a first distance P or a second distance N. When the heat exchange tubes 300 corresponding to the two adjacently disposed unit fins 110 are in communication, whether the first mounting hole 111 or the second mounting hole 112 is closest to the connecting position, the corresponding heat exchange tube 300 can be A long U tube or a semicircular tube of the same specification used for connection with other heat exchange tubes 300 is used for connection.

Referring to FIG. 1 or FIG. 2 or FIG. 4, in the embodiment of the present invention, the first mounting holes 111 of at least two of the unit fins 110 have different apertures; thus, in the multi-fold heat exchanger The heat exchange portion located at the front end of the air conditioner and the heat exchange portion at the rear end of the air conditioner are respectively provided with different pipe diameters, so that the heat transfer efficiency of the entire heat exchanger can be improved according to the refrigerant adjusting the flow path in different heat transfer characteristics of the pipe diameter; A heat exchanger tube 300 having a smaller tube diameter is disposed in the heat exchange portion at the front end, and a heat exchange tube 300 having a larger tube diameter is used in the heat exchanger at the rear end, and heat transfer characteristics in different tube diameters according to different flow states of the refrigerant, in two In the phase region, make full use of the small diameter and more flow paths to improve the heat transfer performance of the refrigerant in the two-phase region; in the gas phase region, make full use of the larger diameter and fewer flow paths to increase the flow rate of the refrigerant in the tube to enhance the single-phase region. The heat exchange performance can greatly improve the heat exchange efficiency of the multi-fold heat exchanger. Specifically, referring to FIG. 1 or FIG. 4, in the at least two unit fins 110, the first mounting hole 111 of one of the unit fins 110 has a hole diameter of 3-6 mm, considering heat exchange efficiency, Process, standardization, manufacturing efficiency, etc., specifically setting a ratio of the first distance P corresponding to the unit fin 110 to the second distance N corresponding to the unit fin 110 is 1.2-1.7; The first mounting hole 111' of the unit fin 110' has a hole diameter of 6-8 mm, and comprehensively considers heat exchange efficiency, process, standardization, manufacturing efficiency, etc., and specifically sets the unit corresponding to the unit fin 110' The ratio of the distance P' to the second distance N' corresponding to the unit fin 110' ranges from 1 to 1.5. By adopting different arrangements at key different positions, the heat exchange efficiency and the manufacturing process are simultaneously broken, and the assembly efficiency and heat exchange efficiency are improved.

Referring to FIG. 5, the present invention further provides a multi-fold heat exchanger comprising a side plate 200, a plurality of stacked heat exchange fins 100, and a plurality of heat exchange tubes 300, The specific structure of the heat exchange fin 100 is referred to the above embodiment. Since the present multi-fold heat exchanger adopts all the technical solutions of all the above embodiments, it also has all the beneficial effects brought by the technical solutions of the above embodiments. I will not repeat them here. Wherein, a plurality of stacked heat exchange fins 100 are disposed on one side of the side plate 200, and a plurality of unit fins 110 corresponding to the heat transfer fins 100 constitute a unit fin 110 group; The heat exchange tubes 300 are mounted on the side plates 200 and are disposed through the corresponding unit fins 110. Specifically, the heat exchange tubes 300 respectively pass through the first mounting holes 111 on the unit fins 110 or The second mounting hole 112 realizes assembly of the heat exchange tube 300 and the unit fin 110 group.

The present invention also provides an air conditioner comprising a multi-fold heat exchanger; the specific structure of the multi-fold heat exchanger refers to the above embodiment, and since the air conditioner adopts all the technical solutions of all the above embodiments, Therefore, all the beneficial effects brought about by the technical solutions of the above embodiments are not repeated here.

It should be noted that the technical solutions of the various embodiments of the present invention may be combined with each other, but must be based on the realization of those skilled in the art, and should be considered when the combination of technical solutions is contradictory or impossible to implement. The combination of the schemes does not exist and is not within the scope of protection required by the present invention.

The above description is only a preferred embodiment of the present invention, and thus does not limit the scope of the invention, and the equivalent structural transformations made by the description of the present invention and the contents of the drawings are directly or indirectly applied to other related technical fields. The same is included in the scope of patent protection of the present invention.

Claims

A heat exchange fin characterized by comprising a plurality of unit fins arranged in a row and a strip connecting piece disposed between two adjacent unit fins, the strip connecting piece The two ends are respectively connected to two adjacent unit fins.
A heat exchange fin according to claim 1, wherein said heat exchange fin further comprises an auxiliary connecting piece disposed between two adjacent said unit fins, and two of said auxiliary connecting pieces The ends are respectively connected to two adjacent unit fins, and the auxiliary connecting piece has a gap with the strip connecting piece at a corresponding position.
The heat exchange fin according to claim 1, wherein a plurality of said unit fins have the same width.
The heat exchange fin according to claim 1, wherein the unit fins are provided with a plurality of first mounting holes for mounting heat exchange tubes, and the plurality of first mounting holes are arranged in parallel Multiple rows, each row including a plurality of said first mounting holes disposed evenly along the length of said unit fins,

In the same unit fin, the first mounting holes of two adjacent rows are staggered, and two adjacent first mounting holes of any one of the rows are spaced apart by a first distance, and any one of the first mounting holes The other two of the first mounting holes that are closest to each other in the adjacent row are spaced apart by a second distance.
A heat exchange fin according to claim 4, wherein said first mounting holes of at least two of said unit fins have the same aperture;

The first distances of the two unit fins having the same aperture of the first mounting hole are equal, and the second distances of the two unit fins having the same aperture of the first mounting hole are equal.
A heat exchange fin according to claim 5, wherein said first mounting holes of said at least two adjacently disposed unit fins have the same aperture; and one of said unit fins is closest to the adjacent portion The first mounting hole is spaced apart from the first mounting hole closest to the other of the unit fins by a first distance or a second distance.
A heat exchange fin according to claim 4, wherein at least one of said unit fins is further provided with a plurality of second mounting holes for mounting heat exchange tubes, said first mounting holes and said first The mounting holes have the same aperture,

In the same unit fin, the second mounting hole is spaced apart from the first one of the first mounting holes by the first distance or the second distance corresponding to the unit fin; the second The mounting hole is spaced apart from the other adjacent second mounting hole by the first distance or the second distance corresponding to the unit fin.
A heat exchange fin according to claim 7, wherein said first mounting holes of said at least two adjacently disposed unit fins have the same aperture;

The second mounting hole of the one of the unit fin groups closest to the abutment is spaced apart from the first mounting hole of the other of the unit fins by a first distance or a second distance; or ,

The second mounting hole closest to the adjacent one of the unit fin groups is spaced apart from the second mounting hole closest to the other of the unit fins by a first distance or a second distance.
A heat exchange fin according to claim 4, wherein said first mounting holes of at least two of said unit fins have different apertures.
The heat exchange fin according to claim 9, wherein at least two of said unit fins are

The first mounting hole of one of the unit fins has an aperture of 3-6 mm, and a ratio of the first distance corresponding to the unit fin to the second distance corresponding to the unit fin is 1.2 -1.7;

The first mounting hole of the other unit fin has an aperture of 6-8 mm, and a ratio of the first distance corresponding to the unit fin to the second distance corresponding to the unit fin is 1-1.5.
A multi-fold heat exchanger, comprising:

Edge board

a plurality of stacked heat exchange fins disposed on one side of the side plate, comprising a plurality of unit fins arranged in a row and strips disposed between two adjacent ones of the unit fins a connecting piece, the two ends of the strip connecting piece are respectively connected with two adjacent unit fins, and the plurality of unit fins of the corresponding position of the heat exchange fin constitute a unit fin group;

a plurality of heat exchange tubes are mounted on the side plates and are disposed through the corresponding unit fin groups.
A multi-fold heat exchanger according to claim 11, wherein said heat exchange fin further comprises an auxiliary connecting piece disposed between two adjacent said unit fins, said auxiliary connecting piece The two ends are respectively connected to two adjacent unit fins, and the auxiliary connecting piece has a gap with the strip connecting piece at a corresponding position.
A multi-fold heat exchanger according to claim 11, wherein a plurality of said unit fins have the same width.
The multi-fold heat exchanger according to claim 11, wherein the unit fins are provided with a plurality of first mounting holes for mounting heat exchange tubes, and the plurality of first mounting holes are arranged a plurality of rows arranged in parallel, each row comprising a plurality of said first mounting holes arranged at even intervals along a length direction of said unit fins,

In the same unit fin, the first mounting holes of two adjacent rows are staggered, and two adjacent first mounting holes of any one of the rows are spaced apart by a first distance, and any one of the first mounting holes The other two of the first mounting holes that are closest to each other in the adjacent row are spaced apart by a second distance.
A multi-fold heat exchanger according to claim 14, wherein said first mounting holes of at least two of said unit fins have the same aperture;

The first distances of the two unit fins having the same aperture of the first mounting hole are equal, and the second distances of the two unit fins having the same aperture of the first mounting hole are equal.
A poly-fold heat exchanger according to claim 15, wherein said first mounting holes of said at least two adjacently disposed unit fins have the same aperture; the closest one of said unit fins The first mounting hole at the abutment is spaced apart from the first mounting hole nearest the other of the unit fins by a first distance or a second distance.
A multi-fold heat exchanger according to claim 14, wherein at least one of said unit fins is further provided with a plurality of second mounting holes for mounting heat exchange tubes, said first mounting holes and said The second mounting holes have the same aperture,

In the same unit fin, the second mounting hole is spaced apart from the first one of the first mounting holes by the first distance or the second distance corresponding to the unit fin; the second The mounting hole is spaced apart from the other adjacent second mounting hole by the first distance or the second distance corresponding to the unit fin.
A multi-fold heat exchanger according to claim 17, wherein said first mounting holes of said at least two adjacently disposed unit fins have the same aperture;

The second mounting hole of the one of the unit fin groups closest to the abutment is spaced apart from the first mounting hole of the other of the unit fins by a first distance or a second distance; or ,

The second mounting hole closest to the adjacent one of the unit fin groups is spaced apart from the second mounting hole closest to the other of the unit fins by a first distance or a second distance.
A multi-fold heat exchanger according to claim 14, wherein the first mounting holes of at least two of said unit fins have different apertures.
A multi-fold heat exchanger according to claim 19, wherein at least two of said unit fins are

The first mounting hole of one of the unit fins has an aperture of 3-6 mm, and a ratio of the first distance corresponding to the unit fin to the second distance corresponding to the unit fin is 1.2 -1.7;

The first mounting hole of the other unit fin has an aperture of 6-8 mm, and a ratio of the first distance corresponding to the unit fin to the second distance corresponding to the unit fin is 1-1.5.
An air conditioner comprising the poly-fold heat exchanger according to claim 11.